Studies on the Surface Wettability and Surface Structure of Polyester Treated with Low Temperature Plasma

Abstract

Abstract: The surface wettability and surface structure of polyester treated with low temperature plasma in O₂, N₂, He, Ar, H, and CH₄ gases are studied.The contact angles of the samples were measured and the critical surface tension y_c was determined on the basis of the Zisman's plots- Furthermore, the values of non-polar dispersion force γ_s^c, dipole force γ_s^aband hydrogen bonding force to the surface tensions for the plasma-treated samples were evaluated by the extended Fowkes equation.Mainly because of the contribution of hydrogen bonding force, the surface free energy and surface wettability of polyester which was treated with O₂, N₂, He and Ar for a short time increased greatly.X-ray photoelectr0n spectroscopy (XPS) shows that the reason was the increase of O₂ 0r N₂ polar functional group on the surface of polyester.

Key words: Low temperature plasma, Polyester, Contact angle, Surface free energy, XPS

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CHEN Jie-Rong. Studies on the Surface Wettability and Surface Structure of Polyester Treated with Low Temperature Plasma[J]. Chem. J. Chinese Universities, 1997, 18(3): 466.

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Studies on the Surface Wettability and Surface Structure of Polyester Treated with Low Temperature Plasma

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